Adda Lovelace was fascinated by Charles Babbage’s Difference Engine. She developed a close working relationship with Babbage and he was awestruck by her impressive mathematical and analytical skills. Together they worked on the analytical engine, with which Lovelace was later asked to translate Menabrea’s memoir. It turned out 3 times longer, as Lovelace had included her method for calculating a sequence of Bernoulli numbers with the Engine in the notes, which would have run correctly had the Analytical Engine been built (it wasn’t built at all until the 1860s). Based on this work, Lovelace is now widely credited with writing the world’s first computer program.